fix: Change the route change logic based on bus events, after creating a new conversation in the widget. (#8328)

app/javascript/widget/constants/widgetBusEvents.js

@@ -1,3 +1,4 @@
 export const ON_AGENT_MESSAGE_RECEIVED = 'ON_AGENT_MESSAGE_RECEIVED';
 export const ON_UNREAD_MESSAGE_CLICK = 'ON_UNREAD_MESSAGE_CLICK';
 export const ON_CAMPAIGN_MESSAGE_CLICK = 'ON_CAMPAIGN_MESSAGE_CLICK';
+export const ON_CONVERSATION_CREATED = 'ON_CONVERSATION_CREATED';